Drier.



PATENTED DEC. 17, 1907.

P. G. SARGENT.

DRIER.

APPLICATION FILED 1\IAY22.1907.

4 SHEETSSHEET 1.

IN VENTOR.

No. 873,796. PATENTED DEC. 17, 1907.

P. G. SARGENT.

DRIER.

APPLICATION FILED MAY 22. 1907. I

' 4 SHEEN-SHEET 2.

. i p N WITNESSES.- I 1 INVENTOR; .49, %W 'fifig vsml" ATTORZYc? No. 873,796 PATENTED DEC. 17, 1907.

F. G. SARGENT.

DRIER.

APPLICATION EILED MAYZZ, 1907.

ooooo o $kpoooooo ooooooo 67 116 OOOOOOO WUTNESEB: HVVENTORJ A77TUUVEYE5 PATE NTED DBO. 17, 190?.

F. G. SARGENT.

DRIER.

APPLICATION FILED MAY22,1907.

INIfENTO R. 50506216.

BY I

A TTORNE Y5 WITNESSES.

5 W. QCQ

' which a screen is located in this being accomplished by means of partiand useful Drier, of which the following is a i specification.

- the screen.

be removed and cleaned ii necossar to roforms of the invention as applied to a certain barren PATENT orrron FREDERICK G. SARGENT,'OF WESTFORD, MASSACHUSETTS, ASSIGNOR TO 0. G. SARGENTS SONS CORPORATION, OF WESTFORD, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

DRIER.

Specification of Letters Patent.

' Application filed Hay 22, 1907- Serial No. 375.123;

No. 878,796. Yatenwu 1.180. 17, 1907.

Figure 1 is a plan of such a machine. Fig. l 2 is a sectional view of the same on the line GENT, a citizen of the United States, residin l 2-3 of Fig. 1, looking toward the left-hand at Westford, in the county of t-iiddlesex. an i 5 side of the sheet. Fig. 3 is a sectional view State of Massachusetts, have invented a new i on the same line looking in the opposite direction. Fig. 4 is a sectional view on the line I 44 of Fig. 1. Fig. 5 is a sectional view on This invention relates to machines for dry- 1 the line 5-5 of Fig. 1, and Fig. 6 is a View ing wool, cotton and other similar substances similar to Fig. 3 showinganother way in and more especially to that type of driers in which the invention can be carried out in a drying chamthis type of machine. her for supporting the material to be dried. I In my Patent No. 675,070 granted May 28, l 1901, I have shown drier of this kind. in l which the air is circulated through a longitudinal chamber and through the material on This device was provided with a To all whom it may concern. I

-Be it known that I, Fan-nearer: G. SAR- an endless convever 11 therein in the form of a screen passing over two drums '12 which supports the wool or other material to be dried on the upper strand thereof. In this side conduit or by-pass through which the type of drier, the fibrous material is fed to air not passing through the screen could be the conveyor by a feed apron 13. In the brou ht around from the 11, var art of the side of the casin at one end is an air inlet a l l o chamber to the lower part below the screen 14, which is usually open, but which can be but the opening through which the air was closed by a door or damper 142. In the obliged topass had to be protected by a chamber 15 at one side are a series of air 011'- screen to prevent the fibrous material from assing through with the draft and being ost. This screen was apt to get clogged up on account of the fibers brought into contact culating devices 16 preferably in the form of fans driven in any esired way and shown in the present instance as drawing air down through the upper strand of the screen .11. with it. There are preferably a plurality of these cir- One of the objects of this invention is to c'ulating deviceslocated at the two ends of provide a construction in which the advanthe machine. In the form shown in the first tages of the above machine may be obtained five figures, there are without the disadvantage of the frequent clogging of the screen leading to the by-pass.

Other objects of the invention are to provide means whereby the screen may readily The drying chamber and the heating chamber 15 are separated by a partition 28 which has openings 29 in front of the fans and extends a short distance above the screen or vide means for regulating the flow of air apron 11.

through the conduit; to provide means for By reference to Fig. 4, it willbe seen that eflecting the air in the drying chamber in when the air circulating devices are conseveral ways so as to insure better circulation structed so as to draw the air in the manner and provide more surely for its passage i indicated by the arrows, the air will pass upthrough the screen and material to be dried, l wardly through the chamber 15 and pass among heating pi ms 17 'or the like over the partition 28 into t e top of the drying chamher and down through the upper strand of the screen back to the space between the two strands of the screen, but it passes through the drier toward the next fan so that it takes approximately a spiral course through the tions so located as to secure these results; also to provide improved means for controlling the passage of the air from the fan or I circulating devices; that is, to permit them l to discharge the air from the machine or circulate it therein; and generally to improve 5 v and simplify the construction of machines of g drying chamber. This is the circulation this type. j which ordinarily takes place from one end of Reference is to be had to the accompathe machine to the other when it is operated nyingdrawings which illustrate preferred in the usual way. The chamber 15, how- I ever, is provided with anoutlet 18 near the lend opposite the inlet. The outlet has a typelofldrying machine and in which,

The invention is illustrated as applied to that kind of drier in which the casing 10 has i four of them, while in the form shown in Fig. 6, there are only two.

' regulating door or damper 19. When this is lint or fibers are deposited upon it.

in the position shown in Fig. 4 the air instead of continuing to circulate in the manner described above will be forced out through the outlet or if the fan works in the other direction the air will be drawn in at this point.

The parts so far described with the exce tion of the outlet" from the'ohamber may e constructed in the same manner as the corre-. sponding parts shown in my above men tioned prior patent. In that patent is shown a conduit or by-pass opening from the upper chamber to permit'alr to part of the drying pass orer the same into the bottom of the dryin chamber. This is to take care of the air no ,passing through the material to be dried. On account of the disadvantages of the articular construction of that =by-pass which have been set forth above, I have pro vided in this-case an opening 20 in the top of the drying chamber and with this I have connected a directly upwardly extending conduit 21 which is connected through a conduit 22 with an openii1g23'to discharge air into the drying chamber below the strand of the screen which holds the material to be dried. By means of the horizontal opening in 'the'top of the chamber and the upwardly extending conduit therefrom, it will be seen that the fibers of the material will not so readily cling to the screen 24 with which the openin is rovided and, consequently, one

o the sa vantages of the former construction is overcome. Moreover, this screen is mounted in horizontal ways 25 so that it may be withdrawn by means of a handle grip or extension 26 so that it may be cleaned if any In the conduit 22 is also located a swing damper 27 which may be turned to any desired position so as to vary the amount 'of air assing through the conduit and shut it o if'desired. 1 x

In addition to the features already described, this invention comprises another feature of advantage in that the circulation of the air is improved and controlled by means of a series of partitions 30, 31 and 32 located respectively above the top strand between the two strands and below the bottom strand of the endless screen. The partition 30 extends downwardly from the top of the drying chamber nearly to the upper strand of the screen so that the material passing along under it will prevent air from assing over it. mg to this partition in either direction must pass downwardly through the screen and thus have more efficiency to dry the material thereon. This partition is also preferably The partition 31 is located between the two Consequently, the air com strands as stated and being offsetfrom the partition 30a substantial distance so that the partitions are separated by a space through which air may circulate, it serves a function similar to that of the partition 30. That is,

the air passing along the drying chamber below the screen, said air havin once passed through the screen or through t e conduit '22,

is forced to pass upwardly again through the V steam coils 17and then down through the material on the. screen to further assist in d? 1 ing it. The space immediately above t partition 31 over the screen is free so that the titiOIl. 1 I

The partition 32 is mounted on hinges or pivots so that it may be ke t in vertical or air may pass along the screen abovethe par-a horizontal position. Being ocated directly below the partition 31 when it is in vertical:

position it forces the air coming against this partition in one direction to pass upwardly throu h the coils as has been stated and when turne to a horizontal position itpermits said air to pass below the partition 31 and consequently if too much air is passing-up wardly this can be regulated by turning this partition 32 to a horizontal position. A damper or door 33 is also located in the top of the partition 31 for a similar purpose. i

It will be observed that the partitions 30 and 31 are off-set from each other so as to 1 permit the air to pass between them either downw'ardlyor upwardly through the material to be dried. They are preferably located near the opposite ends of the opening 20 so that the air toward this opemng may be forced downwardly as has been stated and the -air passing along the lower part of the drying may and out this opening if it is adjusted to permit the same.

I have described the device as having ,only one inlet and outlet but I prefer to have an additional inlet 140 and .outlet 180 so that when both are open more air can be forced chamber from either end of the same I e forced upwardly through the coils' through the device and it will not-travel so' far before being discharged. In ordinary use, however, the outlet 180. and inlet wili be closed by doors or dampers and 141 respectively. The device can be operated also with the fans at one end only operating whichcauses a straight draft through one end and the above described spiral one through the other.

The form of the invention shown in Fig. 6 is substantially the same and is designed for a similar type of machine. As the parts are of similar character, they will not be described in detail.

While I have illustrated and described two, forms in which I prefer to embody the inven-' tion, I am aware that manyeha es ,may' be made therein by-anypersdn skille inthe art without departing from the scope of the innally located venlion as expressed in the claims. Therefore, 1 do not Wish to be limited to theparticular forms shown, but i lVhat I do claim is 1. In a drier, the combination of a drying chamber, a screen therein for supporting a layer of material to be dried, means for causing air to circulate through said dryi chamber to pass through the stock on the screen, and an outlet opening upwardly from the top of said chamber at one side and extending downwardly and entering the chamber below the screen, whereby the air which does not pass through the stool; may be caused to flow baclr under the screen.

2. In a drier, the combination of a drying chamber, a screen therein for supporting layer of material to be dried, -means for causing air chamber to pass through thei stock on the screen, an outlet opening upwardly from the top of said chamber at one side and extend ing downwardly and entering the chamber below the screen, whereby the air which does not pass through the stock may be caused to flow back under the screen, and a screen in the opening in the top of the chamber for preventing fibrous material from passing into said outlet.

In a drier, the combination of a drying chamber, a screen therein for supporting a layer of material to be dried, means for causing air to circulate'through said drying cham her to pass through the stock on the screen, an outlet opening directly upwardly from the top of said chamber and extendim doWnwardly and entering the chamber be ow. the screen, whereby the air whichdoes not pass through the stock may be caused to flow back under the screen, and a removable horizontal screen extending across said outlet and the opening in the top of the chamber.

In a drier, the combination of a drying chamber, a scrcentherein for supporting a layer of material to be drie means for causing air to circulate down through the screen, an upwardly opening outlet in the top of the chamber at one side opposite said circulating means, a conduit from said outlet opening into the chamber below the screen and on the same side of the chamber, a substantially horizontal screen over said opening horizontal guides for said horizontal screen, and a damper in said outlet for controlling the amount of air passin therethrough.

5. In a drier, the combination of a chamber, a plurality of circulatin devices arranged adjacent thereto for drawin air through the chamber, a screen longitudiin the chamber for supporting material to be dried, an outlet in the top of one side of the chamber near the center thereof, a conduit opening directly upwardly from said outlet and connected with .the chamber below the screen, and a downto circulate through said drying wardly extending partition in the chamber ad acent to one end oi said outlet to deflect the currents of air downwardly through the screen and secure a better circulation.

, 6. .ln drier, the combination of a chamber having a plurality of air circulating devices near one side thereof, a longitudinal screen for supporting material to be dried, bypass or conduit opening from above the screen and discharging at a point below the screen, and a partition d \pending from the top of the chamber to a point near the screen, said partition being located near one end or" said conduit or Dy-pass.

7. In a drier, the combination of chamber raving a plurality of air circulating devices near one s de thereof, a lcngitiiidinal 'screen for supporting material to be dried, at by-pass or conduit opening from above the screen and dischar ing at a point below the screen, a partition ependirig from the top of the chamber to a point near the screen, said partition being located near one end of said conduit or by-pass, and a second partition located below the screen and adjacent to the other end of said conduit or by-pass, both of said partitions being located between said air circulating devices.

S. In a drier, the combination-of a chamber, a longitudinal screen therein for supporting material to be dried, a plurality of air circulating devices located on opposite sides of the center of the chamber, a partition depend ing from the top of the chamber and extending substantially to the screen, and a parti tion below the screen and extending therefrom downwardly, said. partitions being of? set from each other a substantial distan e, whereby a current of air will be forced through the screen between the partitions.

9. In a drier, the combination. of a chamber, a longitudinal screen therein for supporting material to be dried, a plurality of air circulating devices located on opposite sides of the center of the chamber, a partition depending from the top of the chamber and extending substantially to the screen, and a partition below the screen and extending therefrom downwardly, said partitions being 01?- set' from each. other a substantial distance, wherebyza current of air will be forced through the screenl'between the partitions.

10. Inc drier, the combination of a chamber, a screen therein for supporting material to be dried, a plurality of air circulating devices, and a'partition extending downwardly from the scre'en to deflect the air circulating in the chamber and causing it to pass through the screen, the space over the screen immediately above'said partition being free, whereby the air. may pass along the screen above the partition. I

11. la a drier, the combination of'a chamber having an endless screen therein for sup porting material to be dried on its upper surof the upper strand of the screen,

face, a partition dependlng'from the top of the drying chamber substantially to the top and a part1- tion between the two strands of the screen, said partitions being separated by a space through which the air may circulate from one side thereof to the other.

12. In a drier, the combination with a drying chambervof an endless screen therein, a

partition above the upper strand of the screen,

afpartition between the strands of the screen 0 '-set from the other partition, and a movable partition below the lower strand and below the partition which is located between said strands.

13. In a drier, the combination with a drying chamber, of a screen therein for support- .in stockto be dried, a stationary partition be owthe screen and a movable partition below the stationary partition.

14. A drier having a drying chamber having an inlet at one end, a second inlet on the same side and near the center, an outlet at the opposite end and on the opposite side and a second outlet on the same side as the first outlet but located near the center of the chamber.

15. A drier having a drying chamber having an inlet at one end, a second inlet on the same side and near the center, an outlet at the opposite end and on the opposite side, and means for closing the inlet near the center.

16. In a drier, the combination of a drying chamber, and air circulatin side thereof, an outletor inleifiocated adjacent to said air circulating devices, and a swing door adapted to be movedto two difl'erent positions whereby the air may be forced out of or into the chamber or may be caused to circulate within the chamber. 1

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses. 3

riiEDEmoK e. SARGENT,

Witnesses:

OSBORN H.'C1 LEY, ARTHUR E. DAY.

devices at one i 

